Direct observation of ferrimagnetic/ferroelastic domain interactions in magnetite below the Verwey transition

Kasama, T. and Church, N. S. and Feinberg, J. M and Dunin-Borkowski, R. E and Harrison, R. J. (2010) Direct observation of ferrimagnetic/ferroelastic domain interactions in magnetite below the Verwey transition. Earth and Planetary Science Letters, 297 (1-2). pp. 10-17. DOI 10.1016/j.epsl.2010.05.004

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Abstract

The magnetic behaviour of magnetite at low temperatures is dominated by its transformation to a monoclinic crystal structure that is simultaneously ferrimagnetic, ferroelastic and ferroelectric below 125 K (the Verwey transition). Here we use electron microscopy to reveal the relationship between ferrimagnetic and ferroelastic domain structures in monoclinic magnetite. We present dynamic observations of magnetite during heating and cooling across the Verwey transition, revealing a diversity of unexpected interaction phenomena between crystallographic twins and magnetic domain walls. This study provides a new understanding of the low-temperature magnetic properties of magnetite that will affect a broad range of rock magnetic studies, from the interpretation of magnetic remanence in terrestrial rocks and sediments to the search for biogenic magnetite in extraterrestrial materials.

Item Type: Article
Uncontrolled Keywords: 2010AREP; IA61;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Earth and Planetary Science Letters
Volume: 297
Page Range: pp. 10-17
Identification Number: 10.1016/j.epsl.2010.05.004
Depositing User: Sarah Humbert
Date Deposited: 09 Sep 2010 10:49
Last Modified: 23 Jul 2013 10:00
URI: http://eprints.esc.cam.ac.uk/id/eprint/1924

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